Grinding-machine



0 n. BUCK GRINDIRJG MACHINE.

APPLICATION man i urezzs. 1920.

Patented Mar. 15, 1921-. I I

2 SHVEETSSHEET I.

"mum;

C. D. BUCK.

GRINDING MACHINE.

APPLICATION FILED JUNE 28, 1920.

1,371,854. mm Mar. 15, 1921:-

39 J 2 SHEETS-SHEET 2| mu m CLYDE D. BUCK, 0F BATTLE CREEK, MICHIGAN.

cements-Macrame.

Specification of Letters Patent.

Patented Mar. 15, 1 921.

Application filed June 28, 1 920. Serial No. 392,326.

T 0 all whom it may concern:

Be it known that I, CLYon D; BUcK, a citizen of the United States, and'resident ofv Battle Creek, in the county of Calhoun and State of Michi an, have invented certain new and useful improvements in Grinding-Machines, of which the following is a specification.

My invention relates to grinding machines and has particular reference to im- 'provements in machines designed especially for grinding to a flat surface the end portions of coiled compression springs.

The improvements contemplated in the present machine over similar types of existing machines consists in simplifying constructions and providing a more compact arrangement of parts; in providing means whereby the machine may be adapted for grinding springs of different lengths; in the provision of an arrangement eliminating the necessity of skill on the part of the operator in properly supplying springs to the machine to be ground; and in the provision of a. simple arrangement to cause the springs after being ground and due entirely to ural influences to eject themselves from machine.

I am disclosing my invention in the best form known to me at present. It is, however, susceptible to various modifications and desirable additions within the spirit and scope of what I have produced as new as particularly defined in the. appended claims.

In the drawings forming a part of my disclosure Figure 1 is a longitudinal section through a machine constructed in accordance with my invention;

Fig. 2, a top plan view;

Fig. 3, a transverse section,

Fig. 4, a top plan of the base with the operating parts removed; I

Fi 5, a plan View of a ring used in conjunction with the feed dial of my machine when it is desired to grind springs of greater length than can be efficiently accommodated by the feed dial alone;

Fig. 6, a section of the ring;

Fig. 7, an enlarged side view of the upper end of the drive shaft for the grind wheels; and i Fig. 8, a section on the line 8-8 of Fig. 7.

Referring now to the drawings in detail, it will be observed that my improved ma chine comprisesa base 10 in the form of a.

substantially rectangular housing, preferably square and open at its upper end and of greater length than width at its bottom to enhance its stability and provided in one wall with a door 11 whereby access may be had to its interior.

Associated with the base 10 is a top including the integrally formed sections12 and 13. Section 12 is of circular shape and provided with an 'upstanding peripheral flange 14, while section 13 is in the shape of a crescent, its uppersurface-being fiat and flush with the upper edge of.,flange 14. The disk-like portion of section 12 is thus disposed below the plane of section 13 and said disk-like portionis provided with a relatively large central circular opening 15.

VVi-thin the base, in relative vertical spaced relation, are bearings 16 and 17 for a vertical shaft 18 which, at its lower end, carries a small bevel gear 19 with which meshes a relatively larger bevel gear 20 on a hori-' zontal shaft 21 journaled in bearings 22' formed on opposite walls of the base. One

end of shaft 21 extends exte'riorly of the "base andfis provided with fixed and loose pulleys 23 and 24, respectively, whereby a drive belt from any suitable source of power may be shifted from one to the other to start or stop operation of the machine.

As best illustrated in Fig. .7 the upper end of shaft 18 is reduced indiameter throughout a suitable portion of its length, as at 25, to provide a shoulder 26 and saidreduced portion 25 is again reduced in diameter, as at 27, to provide a second shoulder 28 above said first shoulder.

ed at their upper ends as at 29, and as best illustrated' in the section, Fig.8, the portion 27 is provided, throughout its length with oppositely disposed channels or recesses 30.

A disk 31 is secured in any suitable man- Both the; reduced'portions 25 and 2.7 are screw threadner to the reduced portion 25 and rests on the shoulder 26, the opening 15 permitting this disk, which is relatively large in diameter, to be disposed with its upper flat surface slightly above the plane of the upper flat surface portion 12 of the top.

Mounted on the reduced portion 25 is a lower grind wheel 32 which seats on the 31. A second disk engaging the upper surface of the grind wheel and a nut 34: en-

- gaging the threads 29 of portion 25 and adapted to be screwed down against disk serves to securely clamp the grind wheel between the disks and to the shaft asis obvious, the u standing flange and the dishlike portion 12 of the top constituting a protective housing for all but the upper flat surface of the grind wheel as is also apparent.

Seated against the shoulder 28 is a disk which preferably carrie. lugs for enga ement with the recesses 3t) u; iereby said dis is caused posltlvely o rotate with the shaft, and seating on ti 5 disk is an upper grind wheel 36 in all respects a diualicate of the lower grind wheel. A shield 37li1 the form of a circular plate rests on the upper lat surface of the grind wheel 36 and 1s pro-- vided with a downturnedperipheral flange 38 which serves to protect the edge of sa d wheel. Seating against this shleld'js a disk 39 similar in all respects to the disk-'35 while engaged withthe threads 29 of the reduced portion 27 is a nut it? which serves to clamp the shield and grind wheel firiply together anddirmly between said disks 35 and RSI Adjacent to the upstanding flange '14 the section 13 of the top is provided "with .a"bear-,

ing 4.1 for a vertical. sha'ft 4;.2 which carries upon its lower end a bevel gear 43 which meshes with a relatively smaller bevel gear 44: on a horizontal shaft 45- journaled in suitable bearings carried by brace members 46 between the base 10 and the portion 33 of the top. A stub shaft is carried by one wall of the base and on this shaftdire'a pair of gears 47 and 48, the latter being consider ably smaller than theformer. with the gear 47 is :r'rehitively smaller gear 49 011 the horizontal. shaft 21 and meshing with the gear 48 is a relatively larger gear 50 on the shaft 45. Rotation of thefix ed pulley 23 therefore not only results in rotation of the vertical shaft 18 and grind wheels 32 and 36 through the gears 19 and 20, but also results in rotation of the rrtical shaft 42 through the two bevel gears 43 and 44; and the train comprised by spur gears 47, 48, 4'9 and 50, the gearing being such that relatively high speed is imparted to the grind wheels and relatively low speed iniparted to the vertical shaft'el2.

Shaft 42 extends above the upper face of the top portion 13 and has fixed thereon a feed disk 51, a considerable portion of which projects between the vertically-spaced upper and lower grind wheels, best illustrated in Fig. is provided near its periphery with a series of openings 52 of any desired size and number.

To operate the machine the springs to be ground a re simply dropped into exposed openings 52 of the disk 51 as said disk rotates, the disk carrying the springs around Ifitis llfeshing I and said disk, as

and between the grind wheels, which, also rotatingl, grind their ends to fiat surfaces. .It will be noted that the springs pass one by one between the grind wheels. as the disk 51 rotates and that until they engage between the grind wheels they are supported and prevented from falling out of the openings 52 by the crescent shaped portion 13 of the top. This is important because the spring need only be dropped into the openings 52 which can be done without skill on the part of the operator.

By reference to Fig. 4 it will be observed that a marginal recess 53 is provided in the portion 13 of the top. Thus, as the disk 51 rotates and the openings "52 become alined with the recess the ground springs will fall successively through said recess and into a suitable receptacle provided to receive them. desired to grind springs of greater length than' can be conveniently accommodated by the disk 51 the thickness of said disk .nray be increased by filler rings 53 as illustnited in Figs. 5 and 6, said rings be) g adapti'ed to be secured to the feed disk 111 any desired manner with the series of openings 54 therein alined in said feed disk. Any desired number of disks 35 may be provided and these will vary in thickness so that'when a filler ring 53 is secured to the feed disk 51 a disk. of proper thickness, is plat-ed beneath .the upper "grind wheel so as to increase the space he- .t/ween the pair of grind wheels and position -the lower face of said upper grind wheel properly with respect to the thickened feed disk. Relatively long springs may thus be supported throughout substantially their entire length during the operation of grinding their ends.

I claim 1. In a grinding machine, a base, a top for said base, a pair of spaced grind wheels, a feed disk having a portion thereof prO ectingbetween the grind wheels, said feed disk being provided with an opening to receive an article to be ground, and a portion of said top underlying said feed wheel and serving to support an article disposed in the opening of said feed wheel.

2. In a machine of the character de ribed, a base. a top therefor, a grind wheel, a ,rotatable feed disk, a portion of the top beingpositioned to support an articlecarried by ,tlie feed disk, said top being provided with a recess located in the path of travel of an article carried by the feed disk.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

' CLYDE D. BUUK. llitnesses C. J. Goonnion. EDNA M. Sonmzn with the openings 

